We've got all four corners covered with this piece!  One post is covered with sisal rope and three with carpet.  With 2 sleep beds on different levels for your cat to share - or not!

34 in. tall, 24 in. square base.  Upper sleep bed is 18 in. exterior (15 in. interior); Lower sleep bed is 14 in. exterior (12 in. interior)

From Linda L:  The cats are rally happy with the cat tree. It's holding up and the quality is excellent.  I'm thinking of ordering another cat tree soon.